Can dogs take Tagamet?

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Is Tagamet (cimetidine) safe for dogs?

Dog’s can only take Tagamet if it’s prescribed by the vet. Generally, Tagamet or Cimetidine is not harmful to dogs and can help to alleviate gastric issues in your dog. But still, you should take precautions, and only give if directed by a vet.

How and when should I give cimetidine to my dog?

Tagamet usually helps your k9 in digestive and intestinal system-related problems like gastric issues like inflammation of the oesophagus or stomach; acid indigestion and heartburn as it reduces stomach acid. It can also be given in case of irritable bowel syndrome (IBS), fighting off parvovirus as well as intestinal and stomach ulcers. In some cases, it may also be helpful in dealing with cancer metastasis.

Cimetidine comes in both tablet and liquid solution form which can be orally given to your dog. A good time to give it would be in the morning, about 30 minutes before your dog’s meal.

What precautions should I take if I decide to give cimetidine to my k9?

Every medicine comes with its own set of precautions, and the precautions taken with this are as follows.

  • You should not switch between different forms of cimetidine without consulting your vet as there can be a difference in dosages.
  • In case your k9 vomits when cimetidine is given on an empty stomach then the next dose should be given along with the meal.
  • Do not use cimetidine if your k9 is allergic to cimetidine or other histamine2 blockers.
  • Avoid using it if your dog is old, having bad health with liver or kidney dysfunction, lactating, and/or pregnant.
  • If your dog is having other medications, consult your vet before giving cimetidine to your dog as it can interfere with other medications.

Potential side effects of Cimetidine on my k9

As such there are not many known Side effects of cimetidine for your k9. Generally, dogs are fine with this medicine. But some potential side effects can be confusion , headache. stomach cramping and diarrhea. If your k9 is suffering from liver or kidney disease then the chances and duration of side effects can be longer.

How long does cimetidine take to effect and how long does it last?

Cimetidine should take effect within 1 to 2 hours of consumption, and you may notice the effects after some time. It lasts about 24 hours after which it usually wears off.

How do I store Tagamet (or cimetidine)?

You should store the tablet form of cimetidine in a dark environment to protect it from light, at room temperature, and away from moisture. Manufacturers put the directions of use on the bottle of the liquid form of this medication.


Tagamet is the commercial name of Cimetidine. It can be given to dogs for digestive and gastric problems commonly, but only with the veteran’s consultation. You should avoid giving cimetidine to your k9 if he’s suffering from any liver or kidney disease. There are various precautions too like the dosage pattern, the amount of medicine, the form of medicine, your k9s current health situation etc. Therefore, it is advised to always consult a vet. The vet would decide the suitable dosage of cimetidine according to various factors like your k9s health, past diseases, size etc. As such it has not been found that it harms the dog’s health but the number of studies is limited. It is advised not to give it to your k9 for a long period of time; there may be chances of lifelong health issues if that is the case.

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